de faucomprlj



(No Model.) 3 Sheets-Sheet 1. X. G. E. DEFAUCOMPR. PHOTOGRAPHIG ROLLHOLDER.

orne .S

Patented July 4,1893.

3 Sheets-Sheet 2. X. G. E. DE PAUCOMPR. PHOTOGRAPHE ROLL HDLDER.

Patented July 4, 1893.

(No Model.)

(No Model.) 3 Sheets-Sheet 3.

X. G. E. DE PAUCOMPR.

PHOTOGRAPHIG ROLL HOLDER.

No. 500,875. Patented July 4, 1893.

UNITED STATES PATENT OFFICE.

XAVIER GUSTAVE EDOUARD DE FAUOOMPRE, OF PARIS, FRANCE.

PHOTOGRAPHIC ROLL-HOLDER.

SPECIFICATION forming part of Letters Patent No. 500,875, dated July 4,1893.

Application iiled August 3,1892. Serial No. 442,073. (No model.):Patented in France July 2, 1891, No. 214,607, and in England November18, 1891, No. 20,007.

To all whom it may concern,.-

Be it known that I, XAvIER GU'sIAvE EDOUARD DE FAUCOMPR, engineer, acitizen of the French Republic, residing at 33 Boulevard Haussmann,Paris, have invented new and useful Improvements in Roll-Holders forPhotographic Cameras, (which have not been patented in any countryexcept France, by Letters Patent dated the 2d day of July, 1891, No.214,607, and Great Britain, by Letters Patent dated the 18th day ofNovember, 1891, No. 20,0075) and Ido hereby declare that the followingis a full, clear, and exact description of the invention, which willenable others skilled in the art or manufacture to which it relates tomake and use the same.

This invention relates to roll-holders of the kind employed inphotographic cameras for carrying a web of sensitive iilm which is woundfrom one roller on to another the negatives being taken on successivelengths of the web stretched between the rollers.

The improvements consist of arrangements and combinations of parts ofthe mechanism for operating the rollers and insuring accuracy inbringing successive lengths into position for exposure in which positionthe tlm is held taut as hereinafter described and claimed.

In the accompanying drawings Figure l is alongitudinal vertical section.Fig. 2 is a sectional elevation of a roll-holder embodying myimprovements and Fig. 3 is a plan with the slide cover removed. Figs. 4and 5 are views showing details hereinafter referred to.

The roll-holder comprises a box A which may be of the ordinary form andadapted to slide into the camera back. Within this box the rolleroperating mechanism is carried by a frame of wood, aluminium or othermaterial composed of vertical side boards or frames B. B connected toabase board B and secured together by a rod B2 which also serves asmeans for lifting the roller frame out of the box A.

In the framing are mounted the rollers C and D the one C carrying theweb ot' sensitive film and the other D for winding on the portion of theweb constituting the negative after each exposure. The web passes fromthe supply roller or spool C over a measuring roll E and thence overguide rollers F, F to the receiving rollerD and the portion stretchedbetween the guide rollers F,Fand extending over the face of the baseboard Bconstitutes the negative length.

The supply and receiving rollers are alike and are interchangeable.These rollers may be made entirely of wood or ot wood and metal. Theyare preferably formed with disk like ends and are carried at one end bypins c. d formed on disks or wheels O and D secured upon spindles in theside frames B. B. At the opposite ends the rollers are held by removablecenter pins O3. D3 having a conical, round, square or other point tosuit the rollers used with any make of sensitive film. These center pinsare each held in place in bushes by means of a spring P as shown at Fig.5 having forked ends embracing a neck formed on each pin. Thisarrangement has for its object to facilitate the removal and replacingof the rollers and itfurther permits ot changing the center pins to suitthe length and make of rollers used.

The external casing or box A has two orices in its side opposite theaxes ot the center pins, and in them are fitted screws c3 d3 which serveboth to secure the rollers in the frame and the frame in the outercasing or box A thus preventing. any displacement ot the film carried bythe rollers relatively to the camera to which the roll-holder is tted.

The receiving roller is wound in one direction by means of a key Qentered through the external box into a recess in the disk D whichcarries the roller, rotation in the opposite direction being preventedby a spring pressed pawl d'L engaging ratchet teeth formed on the diskD.

The winding action, when the parts of the apparatus are in the operativeposition, effects the unwinding of the web from the roller G and theconsequent rotation of the disk O which has formed on it a brake wheelC2 having a brake strap G, regulation of the pressure of which iseffected by a screw g. The passage of the web over the measuring rollerE causes it to rotate and by means of a pinion e on its end in gear witha toothed wheel h on a spindle 72, causes the latter to rotate. On thisspindle is anotched disk II and a cam Il. On the disk Cy are formedratchet teeth with which a pawl I is adapted to engage, a spring t'being fitted to act on the tail or end of the pawl which is centered att". On preparing to draw oft a negative length this pawl I is lifted outof engagement with the zo ratchet disk C by means of' a shoulder formedatj on a lever J centered at j and acted on by a cam K against the powerof a spring 7c by means of a lever handle L the center pin of whichenters a recess in the spindle carrying the cam. The lever J has on itan upwardly projecting finger t7'2 which bears on the disk II and whichis pressed by a spring js acting on the lever J into the notch h2 insaid disk when by the rotation of the latter 2o the notch comes in linewith the finger l7"" the apparatus being therebylocked and the movementof the film carrying roller C sharply stopped by the pawl I entering anotch in the disk C by the pressure of the spring z'. The

z5 finger l7'2 has a beveled end or is otherwise formed to permit ofslight movement of the disk II after the finger has dropped into thenotch, so that the measuring roller may also turn to a small extentwhile the film is drawn 1 3o up taut by the winding roller, D. When thelever J is pressed down by means of the cam K a shoulder j4 on it isengaged by a hook m on the end of' a bar M and it is there held with thepawl I out of engagement with the teeth of the disk C and the finger jiout of the notch h2 in the disk II so that a fresh length of the web maybe drawn off the roller C. The cam Il acting on the opposite end of thebarM pushes it gradually outward until 4o the hook m frees the lever J.The lever J then rises over the hook m which by means of' the spring mreturns the bar M into conn tact with the lower part of the cam I'I, butthe lever J is prevented from rising fully until by the further rotationof the disk II the finger f drops into the notch h2 whereupon it springsupward and the pawl I engages the toothed disk C further rotation of thesupply roller being prevented until the lever 5o J is again depressedbythe action of the cam K operated by the hand lever L. At the same timea leverR centered at r and jointed to the lever J by means of a pin r inthe latter entering a fork in the lever R is thrown up so 5 5 that itsopposite end which carries a pricker or needle r2 is sharply depressedand caused to puncture the sensitive film at the line where the negativelength ends, the punctured orifice serving to subsequently indicate 6owhere the negative length should be cut.

By the arrangement of winding and locking mechanism described the strainon the negative length due to the winding of the roller D against thepower of the brake on 6 5 the supply roller may be kept very light up tothe point at which the supply is stopped by the pawl I after whichhowever it may be increased to render the negative length quite taut bycontinuing to apply pressure on the winding key.

On one side B of the apparatus a toothed disk N is fitted on a stud orspindle having in engagement with its teeth a spring pressed pawl uprovided on the end of the lever J so that at each depression of thesaid lever the disk is partially rotated by the action of the pawl onits teeth, backward movement being prevented by a second pawl a.

On the face of the disk numbers or figures are engraved or otherwisemarked in regular sequence. In the outer box an orifice O is made andfitted with a magnifying glass through which one only of the figures onthe l disk face is visible and as the disk is rotated to the extent of atooth at a time a fresh figure is presented under the magnifying glass.The numbers thus exhibited correspond exactly to the number of negativelengths drawn off and by this means it is always possible to see whatnumber of exposures. have been made.

Having now described the invention, what I desire to claim and secure byLetters Pat ent is l. In a roll-holder for photographic camr eras, thecombination with the rollers for carratchet on disk C and spring pawl I,the latter automatically brought into engagement with the ratchet tolock the supply roller on drawing off a negative length by mechanismactuated from a measuring roller over which the film passes,substantially as described.

2. In a roll-holder for photographic cameras, the combination with thetoothed disks C', D carrying the rollers for the sensitive film, of apawl I adapted to engage with the roller disk C', the lever J, the handlever and cam K adapted to disengage said pawl I, the hooked bar Mengaging said lever and the cam Il actuated by the measuring roller E,substantially as described.

3. In a roll-holder for photographic cameras, the combination with thelever J operated by a cam or pusher K and having on it a finger jg, ofthe hook-bar M, cam II', and notched disk I'I operated by the measuringroller E, the pawl I, and roller disk C', substantially as described.

4. In a roll-holder for photographic cameras, the combination of thelever J having the finger jg, the hook-bar M, cam Il', and notched diskH, operated by the measuring roller E and the needle lever R jointed tothe bar J substantially as described.

5. In a roll-holder for photographic cameras, the combination with theweb carrying rollers C, D, and their tooth carrying disks C', D', themeasuring roller E and the spindle h', operated thereby and having thecam Il and IOO IIO

IZO

notched disk H of the levers J, R, hook-bar M, pawls l and n and counterN carrying a visible record of the negatives exposed, substantially asdescribed.

6. In a roll-holder for photographic canieras, the combination of theside frame of the roll-holder formed with a pin-supporting socket, aremovable center pin supported in said socket and serving as a center orpivot on which the web roller rotates, a spring adapted to hold the pinin place in its socket and permit of its removal therefrom, andadjustable means for holding the pin in contact with the roller inopposition to the action of the spring, substantially as described.

In witness whereof I have hereunto set my hand this 14th day of June,1892.

XAVIER GUSTAVE EDOUARD DE FAUGOMPR. In presence of- ROBT M. HooPER, PAULDE SAINT GRAND,

8 Rue Baudm, Paris.

